Air purifier



FIG. 1 is a perspective view of a preferred embodiment of the air purifier device of the present invention;

FIG. 2 is a right side view thereof, the left side view being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front side view thereof; and,

FIG. 6 is a rear view thereof. 

The ornamental design for an air purifier, as shown and described. 